diff options
Diffstat (limited to 'drivers/scsi/csiostor/csio_init.c')
| -rw-r--r-- | drivers/scsi/csiostor/csio_init.c | 1257 |
1 files changed, 1257 insertions, 0 deletions
diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c new file mode 100644 index 000000000..ccbded335 --- /dev/null +++ b/drivers/scsi/csiostor/csio_init.c @@ -0,0 +1,1257 @@ +/* + * This file is part of the Chelsio FCoE driver for Linux. + * + * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/aer.h> +#include <linux/mm.h> +#include <linux/notifier.h> +#include <linux/kdebug.h> +#include <linux/seq_file.h> +#include <linux/debugfs.h> +#include <linux/string.h> +#include <linux/export.h> + +#include "csio_init.h" +#include "csio_defs.h" + +#define CSIO_MIN_MEMPOOL_SZ 64 + +static struct dentry *csio_debugfs_root; + +static struct scsi_transport_template *csio_fcoe_transport; +static struct scsi_transport_template *csio_fcoe_transport_vport; + +/* + * debugfs support + */ +static ssize_t +csio_mem_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) +{ + loff_t pos = *ppos; + loff_t avail = file_inode(file)->i_size; + unsigned int mem = (uintptr_t)file->private_data & 3; + struct csio_hw *hw = file->private_data - mem; + + if (pos < 0) + return -EINVAL; + if (pos >= avail) + return 0; + if (count > avail - pos) + count = avail - pos; + + while (count) { + size_t len; + int ret, ofst; + __be32 data[16]; + + if (mem == MEM_MC) + ret = hw->chip_ops->chip_mc_read(hw, 0, pos, + data, NULL); + else + ret = hw->chip_ops->chip_edc_read(hw, mem, pos, + data, NULL); + if (ret) + return ret; + + ofst = pos % sizeof(data); + len = min(count, sizeof(data) - ofst); + if (copy_to_user(buf, (u8 *)data + ofst, len)) + return -EFAULT; + + buf += len; + pos += len; + count -= len; + } + count = pos - *ppos; + *ppos = pos; + return count; +} + +static const struct file_operations csio_mem_debugfs_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = csio_mem_read, + .llseek = default_llseek, +}; + +void csio_add_debugfs_mem(struct csio_hw *hw, const char *name, + unsigned int idx, unsigned int size_mb) +{ + debugfs_create_file_size(name, S_IRUSR, hw->debugfs_root, + (void *)hw + idx, &csio_mem_debugfs_fops, + size_mb << 20); +} + +static int csio_setup_debugfs(struct csio_hw *hw) +{ + int i; + + if (IS_ERR_OR_NULL(hw->debugfs_root)) + return -1; + + i = csio_rd_reg32(hw, MA_TARGET_MEM_ENABLE_A); + if (i & EDRAM0_ENABLE_F) + csio_add_debugfs_mem(hw, "edc0", MEM_EDC0, 5); + if (i & EDRAM1_ENABLE_F) + csio_add_debugfs_mem(hw, "edc1", MEM_EDC1, 5); + + hw->chip_ops->chip_dfs_create_ext_mem(hw); + return 0; +} + +/* + * csio_dfs_create - Creates and sets up per-hw debugfs. + * + */ +static int +csio_dfs_create(struct csio_hw *hw) +{ + if (csio_debugfs_root) { + hw->debugfs_root = debugfs_create_dir(pci_name(hw->pdev), + csio_debugfs_root); + csio_setup_debugfs(hw); + } + + return 0; +} + +/* + * csio_dfs_destroy - Destroys per-hw debugfs. + */ +static void +csio_dfs_destroy(struct csio_hw *hw) +{ + debugfs_remove_recursive(hw->debugfs_root); +} + +/* + * csio_dfs_init - Debug filesystem initialization for the module. + * + */ +static void +csio_dfs_init(void) +{ + csio_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL); +} + +/* + * csio_dfs_exit - debugfs cleanup for the module. + */ +static void +csio_dfs_exit(void) +{ + debugfs_remove(csio_debugfs_root); +} + +/* + * csio_pci_init - PCI initialization. + * @pdev: PCI device. + * @bars: Bitmask of bars to be requested. + * + * Initializes the PCI function by enabling MMIO, setting bus + * mastership and setting DMA mask. + */ +static int +csio_pci_init(struct pci_dev *pdev, int *bars) +{ + int rv = -ENODEV; + + *bars = pci_select_bars(pdev, IORESOURCE_MEM); + + if (pci_enable_device_mem(pdev)) + goto err; + + if (pci_request_selected_regions(pdev, *bars, KBUILD_MODNAME)) + goto err_disable_device; + + pci_set_master(pdev); + pci_try_set_mwi(pdev); + + rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); + if (rv) + rv = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + if (rv) { + rv = -ENODEV; + dev_err(&pdev->dev, "No suitable DMA available.\n"); + goto err_release_regions; + } + + return 0; + +err_release_regions: + pci_release_selected_regions(pdev, *bars); +err_disable_device: + pci_disable_device(pdev); +err: + return rv; + +} + +/* + * csio_pci_exit - PCI unitialization. + * @pdev: PCI device. + * @bars: Bars to be released. + * + */ +static void +csio_pci_exit(struct pci_dev *pdev, int *bars) +{ + pci_release_selected_regions(pdev, *bars); + pci_disable_device(pdev); +} + +/* + * csio_hw_init_workers - Initialize the HW module's worker threads. + * @hw: HW module. + * + */ +static void +csio_hw_init_workers(struct csio_hw *hw) +{ + INIT_WORK(&hw->evtq_work, csio_evtq_worker); +} + +static void +csio_hw_exit_workers(struct csio_hw *hw) +{ + cancel_work_sync(&hw->evtq_work); +} + +static int +csio_create_queues(struct csio_hw *hw) +{ + int i, j; + struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); + int rv; + struct csio_scsi_cpu_info *info; + + if (hw->flags & CSIO_HWF_Q_FW_ALLOCED) + return 0; + + if (hw->intr_mode != CSIO_IM_MSIX) { + rv = csio_wr_iq_create(hw, NULL, hw->intr_iq_idx, + 0, hw->pport[0].portid, false, NULL); + if (rv != 0) { + csio_err(hw, " Forward Interrupt IQ failed!: %d\n", rv); + return rv; + } + } + + /* FW event queue */ + rv = csio_wr_iq_create(hw, NULL, hw->fwevt_iq_idx, + csio_get_fwevt_intr_idx(hw), + hw->pport[0].portid, true, NULL); + if (rv != 0) { + csio_err(hw, "FW event IQ config failed!: %d\n", rv); + return rv; + } + + /* Create mgmt queue */ + rv = csio_wr_eq_create(hw, NULL, mgmtm->eq_idx, + mgmtm->iq_idx, hw->pport[0].portid, NULL); + + if (rv != 0) { + csio_err(hw, "Mgmt EQ create failed!: %d\n", rv); + goto err; + } + + /* Create SCSI queues */ + for (i = 0; i < hw->num_pports; i++) { + info = &hw->scsi_cpu_info[i]; + + for (j = 0; j < info->max_cpus; j++) { + struct csio_scsi_qset *sqset = &hw->sqset[i][j]; + + rv = csio_wr_iq_create(hw, NULL, sqset->iq_idx, + sqset->intr_idx, i, false, NULL); + if (rv != 0) { + csio_err(hw, + "SCSI module IQ config failed [%d][%d]:%d\n", + i, j, rv); + goto err; + } + rv = csio_wr_eq_create(hw, NULL, sqset->eq_idx, + sqset->iq_idx, i, NULL); + if (rv != 0) { + csio_err(hw, + "SCSI module EQ config failed [%d][%d]:%d\n", + i, j, rv); + goto err; + } + } /* for all CPUs */ + } /* For all ports */ + + hw->flags |= CSIO_HWF_Q_FW_ALLOCED; + return 0; +err: + csio_wr_destroy_queues(hw, true); + return -EINVAL; +} + +/* + * csio_config_queues - Configure the DMA queues. + * @hw: HW module. + * + * Allocates memory for queues are registers them with FW. + */ +int +csio_config_queues(struct csio_hw *hw) +{ + int i, j, idx, k = 0; + int rv; + struct csio_scsi_qset *sqset; + struct csio_mgmtm *mgmtm = csio_hw_to_mgmtm(hw); + struct csio_scsi_qset *orig; + struct csio_scsi_cpu_info *info; + + if (hw->flags & CSIO_HWF_Q_MEM_ALLOCED) + return csio_create_queues(hw); + + /* Calculate number of SCSI queues for MSIX we would like */ + hw->num_scsi_msix_cpus = num_online_cpus(); + hw->num_sqsets = num_online_cpus() * hw->num_pports; + + if (hw->num_sqsets > CSIO_MAX_SCSI_QSETS) { + hw->num_sqsets = CSIO_MAX_SCSI_QSETS; + hw->num_scsi_msix_cpus = CSIO_MAX_SCSI_CPU; + } + + /* Initialize max_cpus, may get reduced during msix allocations */ + for (i = 0; i < hw->num_pports; i++) + hw->scsi_cpu_info[i].max_cpus = hw->num_scsi_msix_cpus; + + csio_dbg(hw, "nsqsets:%d scpus:%d\n", + hw->num_sqsets, hw->num_scsi_msix_cpus); + + csio_intr_enable(hw); + + if (hw->intr_mode != CSIO_IM_MSIX) { + + /* Allocate Forward interrupt iq. */ + hw->intr_iq_idx = csio_wr_alloc_q(hw, CSIO_INTR_IQSIZE, + CSIO_INTR_WRSIZE, CSIO_INGRESS, + (void *)hw, 0, 0, NULL); + if (hw->intr_iq_idx == -1) { + csio_err(hw, + "Forward interrupt queue creation failed\n"); + goto intr_disable; + } + } + + /* Allocate the FW evt queue */ + hw->fwevt_iq_idx = csio_wr_alloc_q(hw, CSIO_FWEVT_IQSIZE, + CSIO_FWEVT_WRSIZE, + CSIO_INGRESS, (void *)hw, + CSIO_FWEVT_FLBUFS, 0, + csio_fwevt_intx_handler); + if (hw->fwevt_iq_idx == -1) { + csio_err(hw, "FW evt queue creation failed\n"); + goto intr_disable; + } + + /* Allocate the mgmt queue */ + mgmtm->eq_idx = csio_wr_alloc_q(hw, CSIO_MGMT_EQSIZE, + CSIO_MGMT_EQ_WRSIZE, + CSIO_EGRESS, (void *)hw, 0, 0, NULL); + if (mgmtm->eq_idx == -1) { + csio_err(hw, "Failed to alloc egress queue for mgmt module\n"); + goto intr_disable; + } + + /* Use FW IQ for MGMT req completion */ + mgmtm->iq_idx = hw->fwevt_iq_idx; + + /* Allocate SCSI queues */ + for (i = 0; i < hw->num_pports; i++) { + info = &hw->scsi_cpu_info[i]; + + for (j = 0; j < hw->num_scsi_msix_cpus; j++) { + sqset = &hw->sqset[i][j]; + + if (j >= info->max_cpus) { + k = j % info->max_cpus; + orig = &hw->sqset[i][k]; + sqset->eq_idx = orig->eq_idx; + sqset->iq_idx = orig->iq_idx; + continue; + } + + idx = csio_wr_alloc_q(hw, csio_scsi_eqsize, 0, + CSIO_EGRESS, (void *)hw, 0, 0, + NULL); + if (idx == -1) { + csio_err(hw, "EQ creation failed for idx:%d\n", + idx); + goto intr_disable; + } + + sqset->eq_idx = idx; + + idx = csio_wr_alloc_q(hw, CSIO_SCSI_IQSIZE, + CSIO_SCSI_IQ_WRSZ, CSIO_INGRESS, + (void *)hw, 0, 0, + csio_scsi_intx_handler); + if (idx == -1) { + csio_err(hw, "IQ creation failed for idx:%d\n", + idx); + goto intr_disable; + } + sqset->iq_idx = idx; + } /* for all CPUs */ + } /* For all ports */ + + hw->flags |= CSIO_HWF_Q_MEM_ALLOCED; + + rv = csio_create_queues(hw); + if (rv != 0) + goto intr_disable; + + /* + * Now request IRQs for the vectors. In the event of a failure, + * cleanup is handled internally by this function. + */ + rv = csio_request_irqs(hw); + if (rv != 0) + return -EINVAL; + + return 0; + +intr_disable: + csio_intr_disable(hw, false); + + return -EINVAL; +} + +static int +csio_resource_alloc(struct csio_hw *hw) +{ + struct csio_wrm *wrm = csio_hw_to_wrm(hw); + int rv = -ENOMEM; + + wrm->num_q = ((CSIO_MAX_SCSI_QSETS * 2) + CSIO_HW_NIQ + + CSIO_HW_NEQ + CSIO_HW_NFLQ + CSIO_HW_NINTXQ); + + hw->mb_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, + sizeof(struct csio_mb)); + if (!hw->mb_mempool) + goto err; + + hw->rnode_mempool = mempool_create_kmalloc_pool(CSIO_MIN_MEMPOOL_SZ, + sizeof(struct csio_rnode)); + if (!hw->rnode_mempool) + goto err_free_mb_mempool; + + hw->scsi_dma_pool = dma_pool_create("csio_scsi_dma_pool", + &hw->pdev->dev, CSIO_SCSI_RSP_LEN, + 8, 0); + if (!hw->scsi_dma_pool) + goto err_free_rn_pool; + + return 0; + +err_free_rn_pool: + mempool_destroy(hw->rnode_mempool); + hw->rnode_mempool = NULL; +err_free_mb_mempool: + mempool_destroy(hw->mb_mempool); + hw->mb_mempool = NULL; +err: + return rv; +} + +static void +csio_resource_free(struct csio_hw *hw) +{ + dma_pool_destroy(hw->scsi_dma_pool); + hw->scsi_dma_pool = NULL; + mempool_destroy(hw->rnode_mempool); + hw->rnode_mempool = NULL; + mempool_destroy(hw->mb_mempool); + hw->mb_mempool = NULL; +} + +/* + * csio_hw_alloc - Allocate and initialize the HW module. + * @pdev: PCI device. + * + * Allocates HW structure, DMA, memory resources, maps BARS to + * host memory and initializes HW module. + */ +static struct csio_hw *csio_hw_alloc(struct pci_dev *pdev) +{ + struct csio_hw *hw; + + hw = kzalloc(sizeof(struct csio_hw), GFP_KERNEL); + if (!hw) + goto err; + + hw->pdev = pdev; + strncpy(hw->drv_version, CSIO_DRV_VERSION, 32); + + /* memory pool/DMA pool allocation */ + if (csio_resource_alloc(hw)) + goto err_free_hw; + + /* Get the start address of registers from BAR 0 */ + hw->regstart = ioremap(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + if (!hw->regstart) { + csio_err(hw, "Could not map BAR 0, regstart = %p\n", + hw->regstart); + goto err_resource_free; + } + + csio_hw_init_workers(hw); + + if (csio_hw_init(hw)) + goto err_unmap_bar; + + csio_dfs_create(hw); + + csio_dbg(hw, "hw:%p\n", hw); + + return hw; + +err_unmap_bar: + csio_hw_exit_workers(hw); + iounmap(hw->regstart); +err_resource_free: + csio_resource_free(hw); +err_free_hw: + kfree(hw); +err: + return NULL; +} + +/* + * csio_hw_free - Uninitialize and free the HW module. + * @hw: The HW module + * + * Disable interrupts, uninit the HW module, free resources, free hw. + */ +static void +csio_hw_free(struct csio_hw *hw) +{ + csio_intr_disable(hw, true); + csio_hw_exit_workers(hw); + csio_hw_exit(hw); + iounmap(hw->regstart); + csio_dfs_destroy(hw); + csio_resource_free(hw); + kfree(hw); +} + +/** + * csio_shost_init - Create and initialize the lnode module. + * @hw: The HW module. + * @dev: The device associated with this invocation. + * @probe: Called from probe context or not? + * @pln: Parent lnode if any. + * + * Allocates lnode structure via scsi_host_alloc, initializes + * shost, initializes lnode module and registers with SCSI ML + * via scsi_host_add. This function is shared between physical and + * virtual node ports. + */ +struct csio_lnode * +csio_shost_init(struct csio_hw *hw, struct device *dev, + bool probe, struct csio_lnode *pln) +{ + struct Scsi_Host *shost = NULL; + struct csio_lnode *ln; + + csio_fcoe_shost_template.cmd_per_lun = csio_lun_qdepth; + csio_fcoe_shost_vport_template.cmd_per_lun = csio_lun_qdepth; + + /* + * hw->pdev is the physical port's PCI dev structure, + * which will be different from the NPIV dev structure. + */ + if (dev == &hw->pdev->dev) + shost = scsi_host_alloc( + &csio_fcoe_shost_template, + sizeof(struct csio_lnode)); + else + shost = scsi_host_alloc( + &csio_fcoe_shost_vport_template, + sizeof(struct csio_lnode)); + + if (!shost) + goto err; + + ln = shost_priv(shost); + memset(ln, 0, sizeof(struct csio_lnode)); + + /* Link common lnode to this lnode */ + ln->dev_num = (shost->host_no << 16); + + shost->can_queue = CSIO_MAX_QUEUE; + shost->this_id = -1; + shost->unique_id = shost->host_no; + shost->max_cmd_len = 16; /* Max CDB length supported */ + shost->max_id = min_t(uint32_t, csio_fcoe_rnodes, + hw->fres_info.max_ssns); + shost->max_lun = CSIO_MAX_LUN; + if (dev == &hw->pdev->dev) + shost->transportt = csio_fcoe_transport; + else + shost->transportt = csio_fcoe_transport_vport; + + /* root lnode */ + if (!hw->rln) + hw->rln = ln; + + /* Other initialization here: Common, Transport specific */ + if (csio_lnode_init(ln, hw, pln)) + goto err_shost_put; + + if (scsi_add_host_with_dma(shost, dev, &hw->pdev->dev)) + goto err_lnode_exit; + + return ln; + +err_lnode_exit: + csio_lnode_exit(ln); +err_shost_put: + scsi_host_put(shost); +err: + return NULL; +} + +/** + * csio_shost_exit - De-instantiate the shost. + * @ln: The lnode module corresponding to the shost. + * + */ +void +csio_shost_exit(struct csio_lnode *ln) +{ + struct Scsi_Host *shost = csio_ln_to_shost(ln); + struct csio_hw *hw = csio_lnode_to_hw(ln); + + /* Inform transport */ + fc_remove_host(shost); + + /* Inform SCSI ML */ + scsi_remove_host(shost); + + /* Flush all the events, so that any rnode removal events + * already queued are all handled, before we remove the lnode. + */ + spin_lock_irq(&hw->lock); + csio_evtq_flush(hw); + spin_unlock_irq(&hw->lock); + + csio_lnode_exit(ln); + scsi_host_put(shost); +} + +struct csio_lnode * +csio_lnode_alloc(struct csio_hw *hw) +{ + return csio_shost_init(hw, &hw->pdev->dev, false, NULL); +} + +void +csio_lnodes_block_request(struct csio_hw *hw) +{ + struct Scsi_Host *shost; + struct csio_lnode *sln; + struct csio_lnode *ln; + struct list_head *cur_ln, *cur_cln; + struct csio_lnode **lnode_list; + int cur_cnt = 0, ii; + + lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), + GFP_KERNEL); + if (!lnode_list) { + csio_err(hw, "Failed to allocate lnodes_list"); + return; + } + + spin_lock_irq(&hw->lock); + /* Traverse sibling lnodes */ + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + lnode_list[cur_cnt++] = sln; + + /* Traverse children lnodes */ + list_for_each(cur_cln, &sln->cln_head) + lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; + } + spin_unlock_irq(&hw->lock); + + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); + ln = lnode_list[ii]; + shost = csio_ln_to_shost(ln); + scsi_block_requests(shost); + + } + kfree(lnode_list); +} + +void +csio_lnodes_unblock_request(struct csio_hw *hw) +{ + struct csio_lnode *ln; + struct Scsi_Host *shost; + struct csio_lnode *sln; + struct list_head *cur_ln, *cur_cln; + struct csio_lnode **lnode_list; + int cur_cnt = 0, ii; + + lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), + GFP_KERNEL); + if (!lnode_list) { + csio_err(hw, "Failed to allocate lnodes_list"); + return; + } + + spin_lock_irq(&hw->lock); + /* Traverse sibling lnodes */ + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + lnode_list[cur_cnt++] = sln; + + /* Traverse children lnodes */ + list_for_each(cur_cln, &sln->cln_head) + lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; + } + spin_unlock_irq(&hw->lock); + + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); + ln = lnode_list[ii]; + shost = csio_ln_to_shost(ln); + scsi_unblock_requests(shost); + } + kfree(lnode_list); +} + +void +csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid) +{ + struct csio_lnode *ln; + struct Scsi_Host *shost; + struct csio_lnode *sln; + struct list_head *cur_ln, *cur_cln; + struct csio_lnode **lnode_list; + int cur_cnt = 0, ii; + + lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), + GFP_KERNEL); + if (!lnode_list) { + csio_err(hw, "Failed to allocate lnodes_list"); + return; + } + + spin_lock_irq(&hw->lock); + /* Traverse sibling lnodes */ + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + if (sln->portid != portid) + continue; + + lnode_list[cur_cnt++] = sln; + + /* Traverse children lnodes */ + list_for_each(cur_cln, &sln->cln_head) + lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; + } + spin_unlock_irq(&hw->lock); + + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "Blocking IOs on lnode: %p\n", lnode_list[ii]); + ln = lnode_list[ii]; + shost = csio_ln_to_shost(ln); + scsi_block_requests(shost); + } + kfree(lnode_list); +} + +void +csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid) +{ + struct csio_lnode *ln; + struct Scsi_Host *shost; + struct csio_lnode *sln; + struct list_head *cur_ln, *cur_cln; + struct csio_lnode **lnode_list; + int cur_cnt = 0, ii; + + lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), + GFP_KERNEL); + if (!lnode_list) { + csio_err(hw, "Failed to allocate lnodes_list"); + return; + } + + spin_lock_irq(&hw->lock); + /* Traverse sibling lnodes */ + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + if (sln->portid != portid) + continue; + lnode_list[cur_cnt++] = sln; + + /* Traverse children lnodes */ + list_for_each(cur_cln, &sln->cln_head) + lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; + } + spin_unlock_irq(&hw->lock); + + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "unblocking IOs on lnode: %p\n", lnode_list[ii]); + ln = lnode_list[ii]; + shost = csio_ln_to_shost(ln); + scsi_unblock_requests(shost); + } + kfree(lnode_list); +} + +void +csio_lnodes_exit(struct csio_hw *hw, bool npiv) +{ + struct csio_lnode *sln; + struct csio_lnode *ln; + struct list_head *cur_ln, *cur_cln; + struct csio_lnode **lnode_list; + int cur_cnt = 0, ii; + + lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns), + GFP_KERNEL); + if (!lnode_list) { + csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n"); + return; + } + + /* Get all child lnodes(NPIV ports) */ + spin_lock_irq(&hw->lock); + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + + /* Traverse children lnodes */ + list_for_each(cur_cln, &sln->cln_head) + lnode_list[cur_cnt++] = (struct csio_lnode *) cur_cln; + } + spin_unlock_irq(&hw->lock); + + /* Delete NPIV lnodes */ + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "Deleting child lnode: %p\n", lnode_list[ii]); + ln = lnode_list[ii]; + fc_vport_terminate(ln->fc_vport); + } + + /* Delete only npiv lnodes */ + if (npiv) + goto free_lnodes; + + cur_cnt = 0; + /* Get all physical lnodes */ + spin_lock_irq(&hw->lock); + /* Traverse sibling lnodes */ + list_for_each(cur_ln, &hw->sln_head) { + sln = (struct csio_lnode *) cur_ln; + lnode_list[cur_cnt++] = sln; + } + spin_unlock_irq(&hw->lock); + + /* Delete physical lnodes */ + for (ii = 0; ii < cur_cnt; ii++) { + csio_dbg(hw, "Deleting parent lnode: %p\n", lnode_list[ii]); + csio_shost_exit(lnode_list[ii]); + } + +free_lnodes: + kfree(lnode_list); +} + +/* + * csio_lnode_init_post: Set lnode attributes after starting HW. + * @ln: lnode. + * + */ +static void +csio_lnode_init_post(struct csio_lnode *ln) +{ + struct Scsi_Host *shost = csio_ln_to_shost(ln); + + csio_fchost_attr_init(ln); + + scsi_scan_host(shost); +} + +/* + * csio_probe_one - Instantiate this function. + * @pdev: PCI device + * @id: Device ID + * + * This is the .probe() callback of the driver. This function: + * - Initializes the PCI function by enabling MMIO, setting bus + * mastership and setting DMA mask. + * - Allocates HW structure, DMA, memory resources, maps BARS to + * host memory and initializes HW module. + * - Allocates lnode structure via scsi_host_alloc, initializes + * shost, initialized lnode module and registers with SCSI ML + * via scsi_host_add. + * - Enables interrupts, and starts the chip by kicking off the + * HW state machine. + * - Once hardware is ready, initiated scan of the host via + * scsi_scan_host. + */ +static int csio_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) +{ + int rv; + int bars; + int i; + struct csio_hw *hw; + struct csio_lnode *ln; + + /* probe only T5 and T6 cards */ + if (!csio_is_t5((pdev->device & CSIO_HW_CHIP_MASK)) && + !csio_is_t6((pdev->device & CSIO_HW_CHIP_MASK))) + return -ENODEV; + + rv = csio_pci_init(pdev, &bars); + if (rv) + goto err; + + hw = csio_hw_alloc(pdev); + if (!hw) { + rv = -ENODEV; + goto err_pci_exit; + } + + if (!pcie_relaxed_ordering_enabled(pdev)) + hw->flags |= CSIO_HWF_ROOT_NO_RELAXED_ORDERING; + + pci_set_drvdata(pdev, hw); + + rv = csio_hw_start(hw); + if (rv) { + if (rv == -EINVAL) { + dev_err(&pdev->dev, + "Failed to start FW, continuing in debug mode.\n"); + return 0; + } + goto err_lnode_exit; + } + + sprintf(hw->fwrev_str, "%u.%u.%u.%u\n", + FW_HDR_FW_VER_MAJOR_G(hw->fwrev), + FW_HDR_FW_VER_MINOR_G(hw->fwrev), + FW_HDR_FW_VER_MICRO_G(hw->fwrev), + FW_HDR_FW_VER_BUILD_G(hw->fwrev)); + + for (i = 0; i < hw->num_pports; i++) { + ln = csio_shost_init(hw, &pdev->dev, true, NULL); + if (!ln) { + rv = -ENODEV; + break; + } + /* Initialize portid */ + ln->portid = hw->pport[i].portid; + + spin_lock_irq(&hw->lock); + if (csio_lnode_start(ln) != 0) + rv = -ENODEV; + spin_unlock_irq(&hw->lock); + + if (rv) + break; + + csio_lnode_init_post(ln); + } + + if (rv) + goto err_lnode_exit; + + return 0; + +err_lnode_exit: + csio_lnodes_block_request(hw); + spin_lock_irq(&hw->lock); + csio_hw_stop(hw); + spin_unlock_irq(&hw->lock); + csio_lnodes_unblock_request(hw); + csio_lnodes_exit(hw, 0); + csio_hw_free(hw); +err_pci_exit: + csio_pci_exit(pdev, &bars); +err: + dev_err(&pdev->dev, "probe of device failed: %d\n", rv); + return rv; +} + +/* + * csio_remove_one - Remove one instance of the driver at this PCI function. + * @pdev: PCI device + * + * Used during hotplug operation. + */ +static void csio_remove_one(struct pci_dev *pdev) +{ + struct csio_hw *hw = pci_get_drvdata(pdev); + int bars = pci_select_bars(pdev, IORESOURCE_MEM); + + csio_lnodes_block_request(hw); + spin_lock_irq(&hw->lock); + + /* Stops lnode, Rnode s/m + * Quiesce IOs. + * All sessions with remote ports are unregistered. + */ + csio_hw_stop(hw); + spin_unlock_irq(&hw->lock); + csio_lnodes_unblock_request(hw); + + csio_lnodes_exit(hw, 0); + csio_hw_free(hw); + csio_pci_exit(pdev, &bars); +} + +/* + * csio_pci_error_detected - PCI error was detected + * @pdev: PCI device + * + */ +static pci_ers_result_t +csio_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) +{ + struct csio_hw *hw = pci_get_drvdata(pdev); + + csio_lnodes_block_request(hw); + spin_lock_irq(&hw->lock); + + /* Post PCI error detected evt to HW s/m + * HW s/m handles this evt by quiescing IOs, unregisters rports + * and finally takes the device to offline. + */ + csio_post_event(&hw->sm, CSIO_HWE_PCIERR_DETECTED); + spin_unlock_irq(&hw->lock); + csio_lnodes_unblock_request(hw); + csio_lnodes_exit(hw, 0); + csio_intr_disable(hw, true); + pci_disable_device(pdev); + return state == pci_channel_io_perm_failure ? + PCI_ERS_RESULT_DISCONNECT : PCI_ERS_RESULT_NEED_RESET; +} + +/* + * csio_pci_slot_reset - PCI slot has been reset. + * @pdev: PCI device + * + */ +static pci_ers_result_t +csio_pci_slot_reset(struct pci_dev *pdev) +{ + struct csio_hw *hw = pci_get_drvdata(pdev); + int ready; + + if (pci_enable_device(pdev)) { + dev_err(&pdev->dev, "cannot re-enable device in slot reset\n"); + return PCI_ERS_RESULT_DISCONNECT; + } + + pci_set_master(pdev); + pci_restore_state(pdev); + pci_save_state(pdev); + + /* Bring HW s/m to ready state. + * but don't resume IOs. + */ + spin_lock_irq(&hw->lock); + csio_post_event(&hw->sm, CSIO_HWE_PCIERR_SLOT_RESET); + ready = csio_is_hw_ready(hw); + spin_unlock_irq(&hw->lock); + + if (ready) { + return PCI_ERS_RESULT_RECOVERED; + } else { + dev_err(&pdev->dev, "Can't initialize HW when in slot reset\n"); + return PCI_ERS_RESULT_DISCONNECT; + } +} + +/* + * csio_pci_resume - Resume normal operations + * @pdev: PCI device + * + */ +static void +csio_pci_resume(struct pci_dev *pdev) +{ + struct csio_hw *hw = pci_get_drvdata(pdev); + struct csio_lnode *ln; + int rv = 0; + int i; + + /* Bring the LINK UP and Resume IO */ + + for (i = 0; i < hw->num_pports; i++) { + ln = csio_shost_init(hw, &pdev->dev, true, NULL); + if (!ln) { + rv = -ENODEV; + break; + } + /* Initialize portid */ + ln->portid = hw->pport[i].portid; + + spin_lock_irq(&hw->lock); + if (csio_lnode_start(ln) != 0) + rv = -ENODEV; + spin_unlock_irq(&hw->lock); + + if (rv) + break; + + csio_lnode_init_post(ln); + } + + if (rv) + goto err_resume_exit; + + return; + +err_resume_exit: + csio_lnodes_block_request(hw); + spin_lock_irq(&hw->lock); + csio_hw_stop(hw); + spin_unlock_irq(&hw->lock); + csio_lnodes_unblock_request(hw); + csio_lnodes_exit(hw, 0); + csio_hw_free(hw); + dev_err(&pdev->dev, "resume of device failed: %d\n", rv); +} + +static struct pci_error_handlers csio_err_handler = { + .error_detected = csio_pci_error_detected, + .slot_reset = csio_pci_slot_reset, + .resume = csio_pci_resume, +}; + +/* + * Macros needed to support the PCI Device ID Table ... + */ +#define CH_PCI_DEVICE_ID_TABLE_DEFINE_BEGIN \ + static const struct pci_device_id csio_pci_tbl[] = { +/* Define for FCoE uses PF6 */ +#define CH_PCI_DEVICE_ID_FUNCTION 0x6 + +#define CH_PCI_ID_TABLE_ENTRY(devid) \ + { PCI_VDEVICE(CHELSIO, (devid)), 0 } + +#define CH_PCI_DEVICE_ID_TABLE_DEFINE_END { 0, } } + +#include "t4_pci_id_tbl.h" + +static struct pci_driver csio_pci_driver = { + .name = KBUILD_MODNAME, + .driver = { + .owner = THIS_MODULE, + }, + .id_table = csio_pci_tbl, + .probe = csio_probe_one, + .remove = csio_remove_one, + .err_handler = &csio_err_handler, +}; + +/* + * csio_init - Chelsio storage driver initialization function. + * + */ +static int __init +csio_init(void) +{ + int rv = -ENOMEM; + + pr_info("%s %s\n", CSIO_DRV_DESC, CSIO_DRV_VERSION); + + csio_dfs_init(); + + csio_fcoe_transport = fc_attach_transport(&csio_fc_transport_funcs); + if (!csio_fcoe_transport) + goto err; + + csio_fcoe_transport_vport = + fc_attach_transport(&csio_fc_transport_vport_funcs); + if (!csio_fcoe_transport_vport) + goto err_vport; + + rv = pci_register_driver(&csio_pci_driver); + if (rv) + goto err_pci; + + return 0; + +err_pci: + fc_release_transport(csio_fcoe_transport_vport); +err_vport: + fc_release_transport(csio_fcoe_transport); +err: + csio_dfs_exit(); + return rv; +} + +/* + * csio_exit - Chelsio storage driver uninitialization . + * + * Function that gets called in the unload path. + */ +static void __exit +csio_exit(void) +{ + pci_unregister_driver(&csio_pci_driver); + csio_dfs_exit(); + fc_release_transport(csio_fcoe_transport_vport); + fc_release_transport(csio_fcoe_transport); +} + +module_init(csio_init); +module_exit(csio_exit); +MODULE_AUTHOR(CSIO_DRV_AUTHOR); +MODULE_DESCRIPTION(CSIO_DRV_DESC); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DEVICE_TABLE(pci, csio_pci_tbl); +MODULE_VERSION(CSIO_DRV_VERSION); +MODULE_FIRMWARE(FW_FNAME_T5); +MODULE_FIRMWARE(FW_FNAME_T6); +MODULE_SOFTDEP("pre: cxgb4"); |